The minimum energy required to eject a photoelectron from a metal surface is called the work function ($\phi$). The energy of the incident photon must be at least equal to the work function for photoemission to occur. The wavelength of light is inversely proportional to its energy.
The work function for a metal is 4 eV. To emit a photo electron of zero velocity from the surface of this metal, the wavelength of the incident radiation should be
Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023 · Topic: Optics (Wave Nature of Light: Huygens' Principle)
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- The work function for a metal is 4 eV. To emit a photo electron of zero velocity from the surface of this metal, the wavelength of the incident radiation should be - (a) 2700 $\AA$ - (b) 1700 $\AA$ - (c) 5900 $\AA$ - (d) 3108 $ \AA$
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